Designed for EOS cameras, the EF800mm f/5.6L IS USM is a high-performance supertelephoto lens equipped with an Image Stabilizer.

1. EF800mm f/5.6L IS USM
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Instruction

2. Thank you for purchasing a Canon product.
Designed for EOS cameras, the EF800mm 5. The AF Stop button for stopping the AF
f/5.6L IS USM is a high-performance super- operation at anytime.
telephoto lens equipped with an Image 6. Focus preset enables you to focus instantly at
Stabilizer. a preset distance.
• "IS" stands for Image Stabilizer. 7. A truly round aperture hole results in a nicer
• "USM" stands for Ultrasonic Motor. background blur.
8. The lens is compatible with Extender EF1.4X ll
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Features and EF2X ll.
1. The Image Stabilizer gives the equivalent 9. Tight seal structure ensures excellent dust-
effect of a shutter speed four stops faster*.
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The lens also has a second image stabilizer
mode that is optimized for following shots of
O proof and drip-proof performance.
10. Designed for lighter weight with major parts
made of magnesium alloy.
moving subjects. * Based on [1/focal length] second. Generally, it requires
2. The lens features outstanding image quality a shutter speed [1/focal length] second or faster to
through the use of fluorite, super UD, and UD prevent camera shake.
lens elements.
3. Ultrasonic motor (USM) for quick and quiet Conventions used in this instruction
autofocusing. Warning to prevent lens or camera malfunction
4. Manual focusing is available after the subject or damage.
comes into focus in autofocus mode (ONE Supplementary notes on using the lens and
SHOT AF). taking pictures.
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3. a Safety Precautions
This device complies with Part 15 of the FCC Rules. Operation is
a Safety Precautions subject to the following two conditions: (1) This device may not
• Do not look at the sun or a bright light source cause harmful interference, and (2) this device must accept any
through the lens or camera. Doing so could result in interference received, including interference that may cause
loss of vision. Looking at the sun directly through the undesired operation.
lens is especially hazardous. Do not make any changes or modifications to the equipment
unless otherwise specified in the instructions. If such changes or
• Whether it is attached to the camera or not, do not
modifications should be made, you could be required to stop
leave the lens under the sun without the lens cap
operation of the equipment.
attached. This is to prevent the lens from concentrating
This equipment has been tested and found to comply with the
the sun’s rays, which could cause a fire. limits for a class B digital device, pursuant to part 15 of the FCC
• Do not stand on the lens case. Falling off the case Rules. These limits are designed to provide reasonable protection
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could result in injury. against harmful interference in a residential installation. This
• Do not stack lens cases. A falling lens case could equipment generates, uses and can radiate radio frequency
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cause an injury. energy and, if not installed and used in accordance with the
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instructions, may cause harmful interference to radio
communications.
Handling Cautions However, there is no guarantee that interference will not occur in
• If the lens is taken from a cold environment into a a particular installation. If this equipment does cause harmful
warm one, condensation may develop on the lens interference to radio or television reception, which can be
surface and internal parts. To prevent condensation determined by turning the equipment off and on, the user is
in this case, first put the lens into an airtight plastic bag encouraged to try to correct the interference by one or more of
before taking it from a cold to warm environment. Then the following measures:
take out the lens after it has warmed gradually. Do the • Reorient or relocate the receiving antenna.
same when taking the lens from a warm environment • Increase the separation between the equipment and receiver.
into a cold one. • Consult the dealer or an experienced radio/TV technician for
• Do not leave the lens in excessive heat such as in a help.
car in direct sunlight. High temperatures can cause This Class B digital apparatus complies with Canadian ICES-003.
the lens to malfunction.
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4. Nomenclature
Focusing ring (→ 5) Focus mode switch (→ 5)
Hood mount (→ 6) Focusing distance range selection switch (→ 5)
Distance scale (→ 6)
Orientation locking knob (→ 14)
Drop-in filter (→ 12)
Rubber ring (→ 4)
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Playback ring (→ 8)
AF stop button (→ 7) Contacts (→ 4)
Image stabilizer switch (→ 9)
Lens mount index (→ 4)
Image stabilizer mode selector switch (→ 9)
Focus preset button (→ 8) Strap mount (→ 4)
Focus preset switch (→ 8) Tripod mount (→ 14)
For detailed information, reference page numbers are provided in parentheses (→ **).
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5. 1. Mounting and Detaching the Lens
See your camera’s instructions for details on The lens mount has a rubber ring for enhanced
mounting and detaching the lens. water- and dust-resistance. The rubber ring may
cause slight abrasions around the camera's lens
mount, but this will not cause any problems. If the
rubber ring becomes worn, it is replaceable by a
Canon Service Center at cost.
Attaching the strap
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• After detaching the lens, place the lens with the
rear end up to prevent the lens surface and
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electrical contacts from getting scratched.
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• If the contacts get soiled, scratched, or have
fingerprints on them, corrosion or faulty
connections can result. The camera and lens
may not operate properly.
• If the contacts get soiled or have fingerprints on
them, clean them with a soft cloth.
• If you remove the lens, cover it with the dust
cap. To attach it properly, align the lens mount
index and the K index of the dust cap as shown
Thread the end of the strap through the strap
in the diagram, and turn clockwise. To remove it, mount on the lens and then back through the
reverse the order. clasp on the strap. Pull the strap tight and check
that there is no slack in the clasp.
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6. 2. Setting the Focus 3. Switching the Focusing
Mode Distance Range
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To shoot in autofocus (AF) mode, set the focus You can set the focusing distance range at
mode switch to AF. 6m/19.7ft. to infinity, 6m/19.7ft. - 20m/65.6ft., or
To use only manual focusing (MF), set the focus
mode switch to MF, and focus by turning the
focusing ring. The focusing ring always works, C O20m/65.6ft. to infinity.
By setting the suitable focusing distance range,
the actual autofocusing time can be shorter.
regardless of the focus mode.
After autofocusing in ONE SHOT AF mode, focus
manually by pressing the shutter button halfway
and turning the focusing ring. (Full-time manual
focus)
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7. 4. Infinity Compensation Mark 5. Hood
Infinity compensation mark
Distance index
To compensate for shifting of the infinity focus The dedicated Lens Hood ET-155 helps to
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point that results from changes in temperature. prevent stray light from entering the lens and
The infinity position at normal temperature is the protects the front of the lens from rain, snow or
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point at which the vertical line of the L mark is dust.
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aligned with the distance indicator on the To attach the hood, loosen the hood locking knob
distance scale. by turning it counterclockwise. Fit the hood onto
For accurate manual focusing on subjects at
the lens hood mount, and tighten the locking
infinity distance, look through the viewfinder while knob to fix it in place. Use the same procedure,
rotating the focusing ring. in reverse, to remove the hood.
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8. 6. AF Stop Button • The AF stop function also works in AI Servo AF
mode.
• By setting the camera's Custom Function, you
can change the AF stop button's function. For
details, see the camera's instruction manual.
During autofocus operation, you can press the
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AF stop button to temporarily pause autofocus.
If the shutter button is still pressed halfway when
the AF stop button is released, autofocusing will
continue as before.
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• With the EOS 630/600, RT, A2/A2E/5, or 10S/10
set to the AI Servo AF mode and continuous
shooting, AF will not resume even after you let
go of the AF stop button. Press the shutter
release button halfway to resume AF.
• With the EOS A2/A2E/5 and 10S/10 set to the
Sports mode, AF will not resume even after you
let go of the AF stop button. Press the shutter
release button halfway to resume AF.
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9. 7. Focus Preset
By presetting any focusing distance, you can
instantly focus at that point even while you are
shooting a different subject. This function
operates in both the AF and MF modes.
How to Focus at the Preset Distance
While turning the playback ring to the left or
right, press the shutter button completely.
• The lens will focus at the preset distance.
• If the focus preset switch was set to , the beeper
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will sound twice.
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• When turning the playback ring, keep your finger
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away from the shutter button. In One-Shot AF
How to Set mode, the exposure will be locked when you
Set the focus preset switch to or . press the shutter button halfway and focus is
achieved. So if you press the shutter button
Press the shutter button halfway to focus the halfway while turning the playback ring, the
distance you want to preset. exposure may not be correct.
• When not using the focus preset, set the switch
Press the focus preset button. to OFF.
• The focused distance will be preset.
• If the focus preset switch was set to , the
beeper will sound once. In the following cases, the focusing distance scale
will move slightly. It will not affect the image.
• When you press the focus preset button.
• When you turn the playback ring.
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10. 8. Image Stabilizer Settings
You can use the image stabilizer in AF or MF mode.
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Set the STABILIZER switch Select the stabilizer mode. When you press the shutter
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to . • MODE 1: Corrects vibrations button halfway, the Image
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• If you are not going to use the in all directions. It is mainly Stabilizer will start
image stabilizer function, set effective for shooting still operating.
the switch to . subjects. • Make sure the image in the
• MODE 2: It compensates for viewfinder is stable, then press
vertical camera shake during the shutter button the rest of
following shots in a horizontal the way down to take the
direction, and compensates for picture.
horizontal camera shake
during following shots in a
vertical direction.
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11. 9. Tips on Using the Image Stabilizer
The image stabilizer in this lens is effective for hand-held shots or when using a monopod under the
following conditions.
● MODE 1 ● MODE 2
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• In moderately dark areas such as evening • When panning subjects in motion.
scenes.
• In locations where flash photography is
prohibited such as live performances in
theaters.
• In situations where your footing is uncertain.
• In situations where fast shutter settings cannot
be used.
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12. Tips on Using the Image Stabilizer
• The Image Stabilizer cannot compensate for a • Using a tripod also stabilizes the image.
blurred shot caused by a subject that moved. However, depending on the kind of tripod and
• Set the STABILIZER switch to when you shooting conditions, sometimes it may be better
are taking pictures using the Bulb setting (long to turn off the Image Stabilizer function.
exposures). If the STABILIZER switch is set to • The stabilizer is equally effective for hand-held
, the image stabilizer function may introduce photography and photography with a monopod.
errors. • The image stabilizer function also operates when the
• The Image Stabilizer might not be fully effective lens is used with an Extension Tube EF12 ll or EF25 ll.
in the following cases: • With Extender EF1.4X II/EF2X II attached to the
• You shoot while riding on a bumpy road. lens, the Image Stabilizer will work with the
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• You move the camera dramatically for a following cameras:
panning shot in Mode 1. EOS-1Ds Mark III, EOS-1Ds Mark II, EOS-1Ds, EOS-1D Mark
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• You shoot using techniques other than lll, EOS-1D Mark II N, EOS-1D Mark II, EOS-1D, EOS 40D,
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following shots in Mode 2. 30D, 20D, 20Da, 10D, 5D, DIGITAL REBEL XSi/450D, DIGITAL
• The Image Stabilizer consumes more power REBEL XTi/400D DIGITAL, DIGITAL REBEL XT/350D DIGITAL,
than normal shooting, so fewer shots can be DIGITAL REBEL/300D DIGITAL, D60, D30, EOS DCS1, DCS3,
taken if you use the function. D2000, D6000, EOS-1V/HS, EOS-1N/DP/HS/RS, 3, ELAN
• The image stabilizer operates for about two 7E/ELAN 7/30/33, ELAN 7NE/ELAN 7N/30V/33V, ELAN
seconds even when your finger is off the shutter II/ELAN IIE/50/50E, REBEL X/REBEL XS/500, REBEL G/500N,
button. Do not remove the lens while the REBEL 2000/300, REBEL Ti/300V, REBEL T2/300X, REBEL
stabilizer is in operation. This will cause a K2/3000V, IX, IX Lite/IX7, 3000/88, 5000/888
malfunction. • Pictures may look distorted after being taken depending
• With the EOS-1V/HS, 3, ELAN 7E/ELAN on the camera, but this doesn't affect shooting.
7/30/33, ELAN 7NE/ELAN 7N/30V/33V, ELAN • If you set the camera’s Custom Function to
II/ELAN II E/50/50E, REBEL2000/300, IX, and change the assigned button to operate the AF,
D30, the Image Stabilizer will not work during the Image Stabilizer will operate when you press
self-timer operation. the newly assigned AF button.
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13. 10. Drop-In Filters
The lens comes with the drop-in Gelatin Filter Using a Gelatin Filter
Holder 52 holding a glass filter. The holder
accepts commercially-available gelatin filters.
14mm
14mm
47mm
Removing and Installing
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Lift up the holder’s retaining frame
To remove the drop-in filter, press in the left and
right lock buttons and pull the filter holder straight Trim the gelatin filter as shown in the figure,
up out of the slot. and mount it in the holder.
To install the drop-in filter, push the filter holder Return the retaining frame to its closed
straight down into the slot until it clicks into place. position.
• The filter holder can be installed facing either forwards
or backwards. The Drop-In Screw-Type Filter Holder 52 and
Drop-In Circular Polarizing Filter PL-C52 are also
Because the lens optics are designed to include a available (Sold separately).
glass filter, you must always install the filter
holder, even if no gelatin filter is fitted.
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14. 11. Extenders (Sold separately)
With Extender EF1.4X ll or EF2X ll attached, the lens specifications will change as follows:
Item With EF1.4X ll Extender With EF2X ll Extender
Focal length (mm) 1120 1600
Aperture f/8 – 45 f/11 – 64
Diagonal 2°10’ 1°30’
Angle of view Vertical 1°10’ 50’
Horizontal 1°50’ 1°20’
Maximum magnification (×) 0.2 0.28
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• With Extender EF1.4X II attached to the lens, only manual focus is possible. However, with
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the EOS-1Ds Mark III, EOS-1Ds Mark ll, EOS-1Ds, EOS-1D Mark lll, EOS-1D Mark ll N,
EOS-1D Mark ll, EOS-1D, EOS-1V/HS, EOS-3 camera, autofocusing with the center focusing
point is possible.
• With Extender EF2X II attached to the lens, only manual focus is possible.
• First attach the Extender to the lens, then attach the lens to the camera. Detach it from the
camera in the reverse order. If you attach the lens to the camera first, misoperation may
occur.
• Only one Extender can be attached to the lens and camera.
• If you use an Extender on the lens mounted on a EOS A2/A2E/5, set the exposure
compensation to -1/2 stop for the EF1.4X II or -1 stop for the EF2X II.
When an Extender is attached, the AF speed will become slower by design to retain proper AF
control.
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15. 12. Extension Tubes (Sold separately) 14. Case
You can attach Extension Tube EF12 II or EF25
II for magnified shots. The shooting distance and Lid
magnification are shown below.
Camera-to-Subject
Magnification
Distance (mm)
Near Far Near Far Belt
EF12 II 5466 51418 0.16× 0.02×
EF25 II 4982 24356 0.19× 0.04×
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Manual focusing is recommended for accurate Keyhole
focusing. Lever
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procedure below.
13. Using the Tripod Mount Attach the hood in reverse direction, then attach the lens
cap. Keep the hood locking knob facing the direction
Adjusting the Revolving Mount
opposite the tripod mount as shown in the left figure.
You can loosen the orientation lock-knob on the
tripod mount to allow it to rotate as needed to fit Position the tripod mount straight upwards and lay
a particular camera model for switching between the lens into the case as shown in the right figure.
vertical and horizontal positions. Secure the lens with the belt.
Press the lever while holding the lid from the
top, and lock it.
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16. Specifications
Focal Length/Aperture 800 mm f/5.6
Lens Construction 14 groups, 18 elements
Minimum Aperture f/32
Angle of View Diagonal: 3°5’ Vertical: 1°40’ Horizontal: 2°35’
Min. Focusing Distance 6 m/19.7 ft.
Max. Magnification 0.14 ×
Field of View approx. 171 × 256 mm/6.7 × 10.1 inch (at 6 m)
Filter Drop-in 52-series
Max. Diameter and Length 163 × 461 mm/6.4 × 18.1 inch
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Weight 4500 g/158.7 oz.
Hood ET-155
Lens Cap
Case
E-180C
Lens Case 800
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• The lens length is measured from the mount surface to the front end of the lens. Add 26.5 mm when including the
lens cap and dust cap.
• The size and weight listed are for the lens only, except as indicated.
• Closeup Lenses 250D/500D cannot be attached.
• Aperture settings are specified on the camera.
• All data listed is measured according to Canon standards.
• Product specifications and appearance are subject to change without notice.
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CT1-7581-002 © CANON INC. 2008 2009.7